Key matrix for a handset



FIG. 1 is a bottom plan view of the key matrix for a handset;

FIG. 2 is a right side view thereof;

FIG. 3 is a front view thereof;

FIG. 4 is a left side view thereof; and,

FIG. 5 is a perspective front view thereof.

The portions of the drawings shown in broken lines are for illustrative purposes only and form no part of the claimed design. 

I claim the ornamental design for the key matrix for a handset, as shown. 